Tools And Appliances Corporation ( TACO ): CNC Static Tool Holder / Block

TACO = T {Transparency}, A {Accountability}, C {Consistency}, O {Originality},

CNC Static Tool Holder / Block

🛠️ What Is a CNC Static Tool Holder?

A static tool holder is a fixture used on CNC lathes and turning centers to securely mount non-rotating cutting tools such as turning inserts, boring bars, or grooving tools. Unlike driven (live) tool holders, static holders don’t transmit any rotational motion; instead, they allow the rotating workpiece to interact with a stationary tool to perform material removal.

🔩 Key Functions:

v Holds tools like:

Ø Turning inserts (for OD and ID turning)

Ø Boring bars

Ø Grooving and parting tools

v Provides precise alignment and rigid support for accurate machining

v Interfaces directly with turret systems (e.g., VDI, BMT, PTI)

✅ Advantages:

v Simpler and more robust than live holders

v Less expensive and easier to maintain

v Ideal for high-precision turning operations

v Offers excellent repeatability when properly mounted

⚠️ Considerations:

v Not suitable for operations that require tool rotation (like cross-drilling or milling)

v Depends heavily on turret rigidity and tool alignment for dimensional accuracy

🛠️ Types of CNC Static Tool Holders

Tool Holder Type	Primary Function	Typical Mounting Position
Turning Tool Holder	Holds inserts for external turning, profiling, and facing	Radial or axial on the turret
Boring Bar Holder	Supports boring bars for internal turning or facing operations	Axial (parallel to spindle axis)
Parting & Grooving Holder	Designed for cutting off parts or machining grooves	Radial orientation
Threading Tool Holder	Holds tools for external/internal threading	Usually radial
Drill Sleeve Holder	Allows mounting of stationary drills or reamers	Axial position
Adjustable Tool Holder	Offers adjustable angles for specialized turning	Radial or axial
Double Tool Holder	Can mount two tools used to maximize turret station utility	Radial
Angle Head Holder	Positions tools at a fixed angle for chamfering or angled cuts	Custom orientation

Each type is tailored for a specific machining task, ensuring optimal tool support, alignment, and rigidity during cutting. Tool holders must also match the turret interface system such as VDI, BMT, or PTI for secure and compatible mounting.